Pump.



No. 867,117. v PATENTED SEPT. 24, 1907.

J. A. PENSTBR'MAKER.

' PUMP.

APPLICATION FILED n1:o.14.1ooe.

Witnesses 0-, \wlsnmaron. no

i TED "STATES PATENT OFFICE.

PUMP.

Specification of Letters Patent.

Patented Sept. 24, 1907.

Application filed December 14:, 1906. Serial No. 347,894.

To all whom it may concern:

Be it known that I, .Tosnrrr A. FENSTERMAKER, a citizen of the United States, residing at Dos Oabezos, county of Cochise, and Territory of Arizona, have invented certain new and useful Improvements in Pumps, of which the following is a specification.

This invention relates to pumps of the double-acting discharge pipe type.

The principal object of the present invention is the provision of an improved pump of the class set forth, wherein an arrangement of cross-piping is employed, whereby the weight of the water in one discharge pipe nearly counterbalances the weight of the water in the other discharge pipe so thatthe operator, in operating the pump, has only to lift the amount of water in the cylinder being raised and work against the friction engendered in manipulating the pump. In my improved pump, check-valves are used in connection with the cylinders which prevent the water from returning to the cylinders, and the water from one cylinder passes into the discharge pipe on the opposite side of the pump, two flexible pipes being employed to connect the respective cylinders with the respective discharge pipes which are opposite.

I I am aware that double-acting pumps of the reciproeating discharge pipe type have heretofore been employed, but with my improvements the amount of power required to operate the pump is minimized and the present pump can be operated with much less power than other double-acting discharge pipe type pumps.

The invention is set forth fully hereinafter and the novel ieatures are recited in the appended claims.

The accompanying drawing is a side elevation, partly in section, of my pump.

The discharge pipes of my pump are shown at 1 and 2, they being guided by anti-friction rollers 3 on the frame 4. Secured to the lower ends of these pipes by unions or couplings 5, are cross-couplings 6, to which the cylinders 7 are secured, said cylinders having inlet check valves 8 in their lower ends.

Secured to the cross-couplings 6 are stuffing-boxes 9 for the stems 10 of the plungers or pistons 11 which are located in the cylinders 7 and have suitable valves. The stems 10 are secured to the framework and hence the stems and plungers or pistons 11 remain stationary at all times and the cylinders work up and down with the discharge pipes.

Each discharge pipe has a. coupling 12 to which is fastened a check-valve casing 13 containing the checkvalve 14, which prevents the water in the respective discharge pipe from flowing back into the cylinder of the other discharge pipe.

Connected to the respective check-valve casings are flexible pipes 15 and 16, the other ends of said pipes being attached to the cross-unions 6, and these pipes being long enough to permit free up and down movement of the respective discharge pipes and cylinders.

A rocker 20 is suitably fulcrumed at 21 and has its opposite ends connected by links 22 to collars'on the discharge pipes 1 and 2. This rocker or walking-beam 21 may have suitable operating means connected thereto, whereby the said rocker or walking-beam may be oscillated by the operator.

The operation is as follows: When one of the cylinders, and discharge pipes is descending, the other cylinder and discharge pipe is rising. Into the cylinder which is descending, the water flows through the checkvalve 8 below the plunger 11, and the water above the plunger 11 is forced through the flexible pipe (15 or 16) past the check-valve and into the opposite discharge pipe (1 or 2). When the cylinder which has beenpreviously filled is lifted, the water is forced into the opposite discharge pipe, but inasmuch as the two pipes 1 and 2 are filled with water, and hence tend to balance each other, the only weight the operator has to lift is the weight of the water in the cylinder which has just been filled. The additional work which the operator has to perform is the amount of friction in the pump.

By the employment of the stationary plungers or pistons and the use of the two cross connecting flexible pipes 15 and 16, I am enabled to minimize the work of pumping to a far greater extent than is possible with any double-acting discharge pipe pump where only one flexible pipe is employed.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:-

In a double-acting counterbalanced pump, the combination with independent cylinders, of reciprocating discharge pipes which are respectively connected to and movable with said cylinders, independent flexible pipes leading from the respective cylinders to the opposite discharge pipes, check valves preventing backfiow from the discharge pipes into the cylinders, stationary plungers located within the cylinders aforesaid, and means operatively connecting the discharge pipes to cause them to alternate in their reciprocations.

In testimony whereof, I hereunto afiix my signature in presence of two witnesses.

JOSEPH A. FENSTERMAKER.

Witnesses T. B. CHATTMAN, W. K.,DAWSON. 

